Reticulo-endothelial Anatomy Flashcards
What is a small, bean-shaped, encapsulated structure that drains lymphatics?
Lymph node
What is directly under the thin fibrous capsule of a lymph node?
Subcapsular sinus
What is underneath the subcapsular sinus of a lymph node?
The cortex
What is contained within the outer cortex of a lymph node?
Mature B cells
How are mature B cells organized within the outer cortex of a lymph node?
Follicles
What is in the follicles of lymph nodes?
Germinal centers
What is in the germinal center of a lymph node?
Active B cells
What is in the inner cortex of a lymph node?
Mature T cells
What is in the medulla of lymph nodes?
Lymphocytes, plasma cells, and macrophages
Where does lymph drain out of the lymph node?
Medullary sinus
What do the medullary sinus contain?
Macrophages
Where do activated lymphocytes leave?
Via the hilum
Where do nerve fibers enter the the lymph node?
Hilum
What is the body’s largest aggregate of lymphoid tissue?
Spleen
Where does the spleen develop from?
Mesoderm in the dorsal mesentery of the stomach
Where does the spleen lie?
Under the left dome of the diaphragm close to the lower ribs
What are the approximate measurements of the spleen?
1” thick, 3” wide, 5” long, and 7 ounces
Where in the abdomen is the spleen?
Between the 9th and 11th ribs, in the left midaxillary line
What type of tissues are encapsulated in the spleen?
Red and White pulp
The spleen is attached by what ligaments?
Gastrosplenic ligament (contains short and left gastroepiploic arteries) Splenorenal ligament
What structures are near the visceral aspect of the spleen?
Tail of the pancreas
Stomach
Left kidney
Splenic flexure of the colin
Why is the liver considered part of the reticuloendothelial anatomy?
It contains many Kupffer cells that filter out bacteria